Add ALIGN_DOWN and round_down macros to kernel.h
Signed-off-by: Milind Arun Choudhary <[email protected]>
---
kernel.h | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 9ddf25c..f8648b2 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -34,11 +34,13 @@ extern const char linux_proc_banner[];
#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
+#define ALIGN_DOWN(x,a) ((x)&~((typeof(x))(a)-1))
+#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
+#define round_down(x, y) (((x) / (y)) * (y))
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
-#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
-#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
#define KERN_EMERG "<0>" /* system is unusable */
#define KERN_ALERT "<1>" /* action must be taken immediately */
--
Milind Arun Choudhary
-
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